Air-pump.



G. J. PILLING.

Am PUMP.

- APPLICATION FILED FBB.B,;91&

INVENTOR ATToRNEY UNTTED STATES PATENT onirica.

CHARLES J. PILLING, or PHILADELPHIA, PENNSYLVANIA.

AIR-ruler.

1,054,366! spemcation of Lumi' raient.

` Application filed February 6, 1912. Serial No. 675,762.

'To all whom t may concern Be it known that I, CHARLES J. FILLING,

citizen of the United States, residing in the so Y lstructural andy functiona ing the same,

ably shaped base plate 1 city of Philadelphia, State of Pennsylvania, have invented certain new and useful Improvements in Air-Pumps, of which the following isa full, clear, and exact descrip-- tion, reference being had to the accompanying drawings, forming a part of this specication. i

My invention has for its object to provide a manually-o rated air-pump of small comass, adapte especially for the actuation, y compressed air, of apparatus used in pathological and surgical work, and in which means-are provided to use a hollow -piston rod and its adjuncts to operate the means to regulate the volume of com-vair delivered through said hollow-v rod, and to provide a valvular device compiston, pressed rising adjunctive means to attach it to the ollow piston rod, to detachably connect ,thereto a flexible air-delivery tube, to close communication between said elements when desired, a'nd `to open an air-port for the discharge of compressed air from said iexible tube. l

'.lo these ends my invention consists of the elements in combination, hereinafter described, constituting an airump having the In the accompanying. drawings illustrat- Figure 1 is a front elevation; Fig. 2 a side elevation illustrating the mode of holding the device and operating the piston Fig. 3 a central vertical section, and Fig. La like section,`partly 1n elevation, of

` 'some of the elements, detached, but in posiv 40 tion lto beassembled.' s Referring now to said drawings: 1 indicates the cylindrical barrel, preferably provided with a struck-up base '2 to provide a Vconvenient support for a coiled spring 3,

which is preferably tapered so that its upper convolution will closely engage the lower end of a hollow piston rod 4. rIghe barrel is closed bya cap 5 having a raised center 5", and is removably secured by`a bayonet joint 6 `on its flange. The barrel is acked, or made air-tight, byapacking t rough whichV a threaded end ofthe piston rod passes, and is secured by a centrally rforated nut 6. The packing and its adjuncts consist of an inverted flanged cap'?, a suitsupporting .an

characteristicsA annularly n disposed spiral spring 9 and a washer 8 of any soft material, the whole being held in\assembled relation by the not 6 on the threaded end of the piston rod.

iently operated by one hand only, and to this end the iston rod is supplied with a pair of grasping handles 11, 11, in order that they may be actuated by the first and second fingers while the base of thebarrel is supported by the thumb. Where the device is used 1n connection with surgical apparatus. this construction, which leaves the other hand of the operator, perfectly free, is found. most convenient and useful.

Mounted on the free end of the hollow piston rod 4, and preferably integjal there with, isan iliterioily-threaded cup 12, with an aperture iii its basal end coinciding with the hollow interior oi the piston rod. Said cup is provided to operatively contain a re- .silieutlyoperating check valve, constructed as follows, namely, a plunger 12 carries on its lower end a pin' 15 which projectsK4 through a washerv14, the pin serving as well to centrally dispose 'the washer and to enterrthe aforesaid basal aperture. in the cup 12, and also enable the washer, when worn,

to be readily removed and. replaced by a new one.' y'Superposed over the washer and bearing thereon is av spiral spring 16 `adapt- -ed to be putfunder compression. A. screw 17 iS provided with a hub end 18 entering the opposite end of the spiral spring, and

is' made" hollow to afford a passageway for Patenten Mar. a, isis.

di) The pump is adapted to be most Couven stated are held in operative position by the threaded end 20 of the element 19 now about to be described. The detail construction of these elements and the method of Y. y

assembling them will best be understood by reference'to l*1 ig. 4 showing the several parte detached and ready to be assembled in the manner stated. It will be apparent from this description that the washer and pin ifi:

15 operate as a spring-actuated chec'li valve,

normally closing the air-discharge passage between the hollow piston rod .and the apen ture formed by the hollow bindingscrew 17, while opening against thepressure of iii the spring when the cylinder pistorflis actuated to compress and discharge compressed air; and it is obvious that the delivery may, by these means, be adjusted and controlled as desired.

.The remaining element of the device consists of what may call a valvular nipple, shown in detached elevation at top of Fig. It and in sect-ion, in assembled position at top of Fig. 3. lt consists of a longitudinally hollow body portion 19 having the aforesaid threaded lower end 2U adapted to enter and register withv the interiorlythreaded cup 12. On its opposite en d is provided a corrugated nipple 21 to detachably hold` as usual. a section of rubber tubinganot shown, leading to the desired ultimate point of discharge oi compressedair. But in order to enable the operator to use this element to receive and' discharge or exhaust through it, in the opposite direction, a return volume of 'the compressed air, it is provided with an interiorly-threadeil hub 24 extending transversely to the body portion 19, and acting as a hearing for a screw-threaded needle valve 2Q on the outer end of which is an operating wheel The point of the needle valve is adapted lto extend into the hollow interior or air-passage 25 of the body portion and operates to close the said air-passage when suitably actuated by the hand wheel 23. It. is obvious'that the volume of disrha ot compressed air, through the nipple may' be regulated thereby; and out ofi entirely when the valvularl device is to be employed to disch rgc, inthe opposite direction a return volume of such air, for which purpose the needle valve is provided with a suitable slot in its periphery which, on rotation. is brought into coincidence with the discharge aperture Q6 in the bearing hub Q4 of the device.

The operation of the device, the functions of its several parts, and its utility, are obrions from the description. y

Having thus described my invention, l claim as new and desire to secure byjLetters Patentzu- 1. An air-pump of the class recited comprising a cylinder, piston, hollow piston rod communicating with the interior of the cylinder, and means to actuate said rod, of adjustable valvular means coincident with the tubular interior of the piston rod, normally cocasse closingsaid tubularpassageway, said means comprising an interiorly-threaded valve casing, a 'plunger therein carrying' a washer and a pin adapted to enter and close the open free end of the hollow piston rod, a coiled spring resiliently acting on said lunger, and a centrally-apertured,springolding and adjusting screw engaging interiorly the opposite threaded end of the valve casing.

f2. An air pump of thel class recited comprising in 4combination with a cylinder, piston, hollow piston rod communicating with the interior of the cylinder,with means to actuate the same, ot means to regulate the delivery of compressed air through the piston and hollow piston rod and also tO prevent its return to the cylinder, said means comprising an interiorly threaded valve casing operatively coincident at its lower end with the tubular interior of4 the piston rod, and a'centrally-apertured screw nut adapted to enter its opposite end; a plunger carrying a washer and a pin, with a spiral. spring adapted to be adjustably tensioned' by-said apertured screu7 nut., and constituting an adjustable and resiliently-acting check valve in said casing, normally closing the air-passage of the piston rod, and a valve-controlled tubular air-delivery means operatively engaging the opposite end of said check-valve casing.

3. In a device ofthe class recited, the combination with a Apiston cylinder, hollow piston rod, and devices to reciprocate said-two last-mentioned elements, of tubular means communicating with the delivery end of the hollow pistonrod, said means comprising a hollow valve body provided with an alining corrugated nipple, and a transverselydisposed hub, threaded interiorly and' having au aperture in its periphery, a threaded and slotted needle-valve and means to operate it mounted on said threaded hub, whereby it may be rota-tively brought into closing rotation to said nipple and into register with said aperture in the hub to -discharge compressed air throgh the same.

ln testimony whereof, l have hereunto affixed my signature this 31st day of January A. D. 1912'.

CHARLES J. FILLING.

Wit-nesses: y

A. M. BIDDLE, R. A..DUNLA1 

